During the preparation of colloidal sol by Bredig's are method, traces of alkali (NaOH or N a 2 C O 3 ) is added to

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During the preparation of colloidal sol by Bredig's are method, traces of alkali (NaOH or $N a_{2} C O_{3}$ ) is added to

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Answer:

B

Solution:

During the preparation of colloidal sol by Bredig's are method, traces of alkali (NaOH or $N a_{2} C O_{3}$ ) is added to stabilize the sol.the $O H^{-}$ ions get absorbed on the surface of metal sol particles making them –vely charged hence, the charged sol particles are prevented from coming together.

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